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US 8,524,854 B2Granted
Chloro-substituted polyetherimides having improved relative thermal index
AssigneeSabic Innovative Plastics IP B.V.
InventorsHendrich Chiong, Thomas Link Guggenheim, Farid Fouad Khouri, Matthew L. Kuhlman, Miguel Angel Navarro de Castro, Roy Ray Odle, Brennan A. Smith
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Abstract
A polyetherimide having an OH content that is greater than 0 and equal or less than 100 ppm; a Relative Thermal Index that is greater than or equal to 170° C.; and a chlorine content that is greater than 0 ppm is disclosed herein. A method for preparing the polyetherimide is also disclosed.
Claims29
A polyetherimide comprising a structural unit of Formula (I):
- wherein R and R′ can be a linear or cyclic C2 to C20 alkyl group or a substituted or unsubstituted C6 to C30 aryl group, n has a value of 1 to 40,
- wherein the polyetherimide has an OH content that is greater than 0 and less than or equal to 100 parts per million by weight (ppm);
- wherein the polyetherimide has a Relative Thermal Index that is greater than or equal to 170° C. measured using the protocol UL746B;
- and
- wherein the polyetherimide has a chlorine content that is greater than 0 ppm.
2 more elements
Dependencies are inferred from the claim text.